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	Type	Seidman, D. N.; Current, M. I.; Pramanik, D.; Wei, C. Y.
	Publication	Direct observations of the primary state of radiation damage of ion-irradiated tungsten and platinum	Volume	Journal Article
Pages	1981
	Abstract	Nuclear Instruments and Methods
	Corporate Author
Publisher	182-183
Editor	1
	Summary Language	477-481	Series Editor
Abbreviated Series Title	A brief summary of the major results of Cornell work on the primary state of radiation damage in ion-irradiated tungsten and plantinum is presented. The primary research tool for this research is the field-ion microscope (FIM). The FIM is ideally suited for this research because of its excellent atomic resolution and the ability to examine the interior of the specimens as a result of the field-evaporation effect. This paper summarizes, in outline form: (1) the main experimental programs; (2) the principal experimental quantities determined from the analyses performed on all the individual depleted zones (DZs) observed; (3) a number of the more important results and conclusions concerning the vacancy structure of DZs; and (4) the three-dimensional spatial distribution of self-interstitial atoms detected around DZs in tungsten which had been irradiated and examined in situ at <10 K.
	Series Issue		ISSN
Medium
	Expedition		Notes
Call Number
Contribution Id
Serial		URL		ISBN
														no	8079
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	Seidman, David N.; Current, Michael I.; Pramanik, Dipankar; Wei, Ching-Yeu		Atomic resolution observations of the point defect structure of depleted zones in ion-irradiated metals		Journal Article	1982	Journal of Nuclear Materials	J. Nucl. Mater.	108-109		67-68		The previous termpoint defectnext term structure of individual depleted zones (DZs) created by a variety of different projectile ions, with energies in the range 15–90 keV, was studied employing the field-ion microscope technique [1–9]. The irradiations were performed in situ at a temperature of less than. 15 K in the case of tungsten and 40 K for platinum. The fluence was always less then 1013 ions cm−2, so that each depleted zone detected was created by a single energetic projectile ion. The following variables were studied: (1) the effect of varying the initial energy of the projectile ion at constant projectile mass; (2) the effect of varying the projectile mass at constant initial energy of the projectile ion; and (3) the non-linear effects produced by employing dimer ions (W+2 and Ag+2). The analyses of the depleted zones consisted of measuring and/or determining the following quantities: (1) the number of vacancies per DZ; (2) the spatial distribution of self-interstitial atoms around the DZs in the case of tungsten; (3) the dimensions of the DZs; (4) the vacancy concentration per DZ; (5) the radial distribution function of the vacancies within each DZ; (6) the radiation damage profiles due to the cumulative effects of many DZs; and (7) the non-linear effects produced by the dimer irradiations. The results are discussed and compared with different analytical theories and computer simulations of the primary state of radiation damage.			no	8285
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	Current, M. I.; Wei, C. Y.; Seidman, D. N.		Direct observation of the primary state of damage of ion-irradiated tungsten: II. Definitions and results		Journal Article	1983	Philosophical Magazine A	Phil. Mag. A	47		407-434					no	8353
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	Current, Michael I.; Seidman, David N.		Sputtering of tungsten: a direct view of a near surface depleted zone created by a single 30 keV63 Cu+ projectile		Journal Article	1980	Nuclear Instruments and Methods		170	1-3	377-381		The vacancy structure of near-surface depleted zone (DZ), created by a single 30 keV 63Cu+ ion in a tungsten field-ion microscope (FIM) specimen, was determined with atomic resolution. Both the irradiation and pulse field-evaporation experiments were performed in situ at less, approximate11 K, so that the observed vacancy structure was unaltered by the long-range migration of self-interstitial atoms. The following basic physical quantities were measured: (1) the number of vacancies; (2) the dimensions; (3) the vacancy concentration; (4) the distribution of first-nearest-neighbor vacancy clusters; and (5) the radial-distribution function for the vacancies out to ninth-nearest neighbor. The values of these quantitieswere shown to be similar for both the near-surface DZ and DZs created in the bulk of the same specimen by 30 keV 63Cu+ projectiles.			no	8862
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	Cerezo, A.; Gibuoin, D.; Kim, S.; Sijbrandij, S. J.; Venker, F. M.; Warren, P. J.; Wilde, J.; Smith, W., G D		Materials applications of an advanced 3-dimensional atom probe		Journal Article	1996	Journal de Physique IV	J. de Phys. IV	6	C5	205-210	3D Atom Probe, Technique/review	An advanced 3-dimensional atom probe system has been constructed, based on an optical position-sensitive atom probe (OPoSAP) detector with energy compensation using a reflectron lens. The multi-hit detection capability of the OPoSAP leads to significant improvements in the efficiency of the instrument over the earlier serial position-sensing system. Further gains in efficiency are obtained by using a biassed grid in front of the detector to collect secondary electrons generated when ions strike the interchannel area. The improvement in detection efficiency gives enhanced performance in the studies of ordered materials and the determination of site occupation. Energy compensation leads to a much improved mass resolution (m/Δm full width at half maximum) making it possible to map out the 3-dimensional spatial distributions of all the elements in complex engineering alloys, even when elements lie close together in the mass spectrum. For example, in the analysis of a maraging steel, this allows separation between the 61Ni2+ and 92Mo3+ peaks, which are only 1/6 of a mass unit apart.			no	1954
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	Dadykin, A. A.; Naumovets, A. G.; Yatsenko, A. F.; Andreev, V. D.; Nachal'naya, T. A.; Semenovich, V. A.; Lavrentovich, Y. I.		Emission characteristics of diamond-like films		Journal Article	1996	Sverkhtverd. Mater.		1		25-29	Field Emission				no	1968
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	Choi, W. B.; Myers, A. F.; Wojak, G. J.; McClure, M. T.; Cuomo, J. J.; Hren, J. J.		The effects of the interface and surface treatment on the electron emission from diamond coated field emitters		Journal Article	1996	Int. Vac. Microelectron. Conf., 9th (1996), 288-292 Publisher: Nevskii Kur'er, St. Petersburg, Russia.				288-292	Field Emission				no	1986
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	Choi, W. B.; Cuomo, J. J.; Zhirnov, V. V.; Myers, A. F.; Hren, J. J.		Field emission from silicon and molybdenum tips coated with diamond powder by dielectrophoresis		Journal Article	1996	Applied Physics Letters	Appl. Phys. Lett.	68		720-722	Field Emission				no	2035
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	Liu, J.; Zhirnov, V. V.; Choi, W. B.; Wojak, G. J.; Myers, A. F.; Cuomo, J. J.; Hren, J. J.		Electron emission from a hydrogenated diamond surface		Journal Article	1996	Applied Physics Letters	Appl. Phys. Lett.	69		4038-4040	Field Emission				no	2037
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	Zhirnov, V. V.; Choi, W. B.; Cuomo, J. J.; Hren, J. J.		Diamond coated Si and Mo field emitters: diamond thickness effect		Journal Article	1996	Applied Surface Science	Appl. Surf. Sci.	94/95		123-128	Field Emission				no	2101
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